* [ALTCHA JS Library v2.6.0](https://github.com/altcha-org/altcha-lib) – Lightweight, zero-dependency JavaScript library for creating and verifying ALTCHA challenges.

* [ALTCHA Go Library v2.4.0](https://github.com/altcha-org/altcha-lib-go) – A Go library for creating and verifying ALTCHA v2 proof-of-work challenges, including local and remote verification support.